Index: firmware/App/Services/DDInterface.c
===================================================================
diff -u -r1b83a4555c4040a45cecfbea45b6570812ab281e -rbcc80fde38b8b94c64a7ad615f9ca3cb6e98c77e
--- firmware/App/Services/DDInterface.c	(.../DDInterface.c)	(revision 1b83a4555c4040a45cecfbea45b6570812ab281e)
+++ firmware/App/Services/DDInterface.c	(.../DDInterface.c)	(revision bcc80fde38b8b94c64a7ad615f9ca3cb6e98c77e)
@@ -15,6 +15,7 @@
 *
 ***************************************************************************/
 
+#include "DDDefs.h"
 #include "DDInterface.h"
 #include "MessagePayloads.h"
 #include "Messaging.h"
@@ -616,7 +617,8 @@
     {
         dialysateDeliveryCmdSet.substitutionRate = qs;
 #ifndef TEST_UI_ONLY
-        sendMessage( MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA, COMM_BUFFER_OUT_CAN_TD_2_DD, (U08*)(&dialysateDeliveryCmdSet), sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );
+        sendMessage( MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA, COMM_BUFFER_OUT_CAN_TD_2_DD,
+                     (U08*)(&dialysateDeliveryCmdSet), sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );
 #endif
     }
     else
@@ -625,7 +627,25 @@
     }
 }
 
+/*********************************************************************//**
+ * @brief
+ * The cmdStartDDFlush function sends a start flush command message to
+ * the DD.
+ * @details \b Inputs: none
+ * @details \b Outputs: start flush mode command sent to DD.
+ * @return none
+ *************************************************************************/
+void cmdStartDDFlush( void )
+{
+    UI_RESPONSE_PAYLOAD_T response;
+    memset( &response, 0, sizeof( UI_RESPONSE_PAYLOAD_T ) );
+    response.accepted = TRUE;
 
+    ddCmdResp[ DD_CMD_START_FLUSH ].commandID = DD_CMD_NONE;
+    sendMessage( MSG_ID_TD_DD_FLUSH_REQUEST, COMM_BUFFER_OUT_CAN_TD_2_UI, (U08*) &response, sizeof( UI_RESPONSE_PAYLOAD_T ) );
+}
+
+
 /*************************************************************************
  *                       TEST SUPPORT FUNCTIONS
  *************************************************************************/